Padlock



March 17, 1931. c. LEDlN 1,796,467

PADLOCK Filed April 27, 1928 H m WI II/5' lNVENTOR ATTORNEY PatentedMar. 17, 1931 UNlTED STATES ATENT OFFICE CHARLES LEDIN, OFSTAMFORDpCONNECTICUT, ASSIGNOR TO THE YALE & TOWNE MANUFACTURINGCOMPANY, OF STAMFORD, CONNECTICUT IPADLOCK Application filed. April 27,

This invention relates to padlocks of the type used for railroad switchwork. The object of the invention is to provide a simple but verydurable mechanism, which will be capable of securely locking the shackleof the padlock and which, at the same time, will be able to withstandattempts at picking the locking mechanism.

In the drawing, Figure 1 represents my padlock with the shackle locked.Figure 2 shows the padlock with the shackle fully opened. Figure 3 is afront and side view of my shackle heel locking tumbler. Figure 4 is afront and side View of my shackle nose locking tumbler. Figure 5 is aview of my shackle ejecting tumbler.

Referring to the drawings, reference numeral 1 refers to the usual typeof casing used for this type of padlock, and 2 indicates the shackle,which is provided with a nose looking portion 3 and a heel lockingportion 4.

A tumbler 5 is spring pressed by the spring 6 in a direction to lock thenose of the padlock by means of the hook portion 7. A sec- 0nd tumbler 8is spring pressed by a spring 9 in a direction whereby its tail portion10 will act to lock the shackle by cooperation with the shackle heellocking portion 4.

As will be noted, the heel locking tumbler S is equipped with a pin 11which is adapted when the tumblers are in locking position to lie withina slot 12 in the nose locking tumbler It is quite obvious from thisconstruction that in order to release the shackle, it is necessary tofirst remove tumbler 8 from looking position so as to withdraw the pin11 from the slot 12. Otherwise, it is impossible to remove tumbler 5from its locking position. This construction will require a certainsequence of operation of the tumblers,

and is quite effective in preventing the picking of the padlock.

A further feature of my padlock is the shackle ejecting tumbler 13,which is pivoted on the pin 14 which supports the tumbler 8. Thisshackle ejecting tumbler is loosely held within the padlock casing andnormally rests by means of gravity against the pin 15 upon which ismounted the heel locking 5 tumbler 8. The padlock shackle is equipped1928. Serial No. 273,372.

with a shackle extension 16 and the tumbler 13 is adapted when thetumblers are released to be actuated by a key to cooperate with theportion 16 to eject the shackle when the same has been released by itstumblers. The

actual operation 11.. will move so as to first actuate the tumbler 8, torelease the shackle heel and remove the pin 11 from the slot 12. It willthen cooperate with the tumbler 5 so as to release the nose of theshackle. Further operation will cause it to actuate the tumbler 13 so asto force the portion 13 of said tumbler against the shackle extension 16so as to eject the shackle.

I claim:

1. In a padlocl a casing, a shackle equipped with toe and heel lockingportions, a tumbler for locking said shackle at its toe portion, asecond tumbler for locking said shackle at its heel portion, a pincarried by said second tumbler for locking said first tmnbler until saidsecond tumbler is released by a proper key, and a shackle ejectingtumbler in said casing adapted to be actuated by the key to eject theshackle when it has been released by its tumblers.

2. In a padlock, a casing, a shackle pivoted therein, and equipped withtoe and heel locking portions, a pair of tumblers independently pivotedfor independently locking said toe and heel, a pin on one of saidtumblers cooperating with a slot on the other or said tumblers to lockthe same until said first tumbler is released, an extension arm at theheel of the shackle, and a shackle ejecting tumbler loosely held on atumbler pivot and cooperable with said shackle extension when actuatedby a key to eject the shackle when the same is released by the tumblers.

Signed at Stamford, in the county of Fairfield and State of Connecticut,this 25th day of April, A. D. 1928.

CHARLES LEDIN.

